hi I want to know know what is the Difference between PARAM and BRIEF???
You seem to have forgotten a very important step - to supply enough context that people would know what you are talking about.
Possibly you might ask about Doxygen \brief and \param - but you really need to improve your skills at asking questions. With a bit of training, you can even get Google to understand your questions which would allow you to get answers at any hour of any day of the year.